I remember from years ago there was a gameplay demo that was shown at some convention for the first modern warfare. I clearly remember it starting out as the player being a Russian soldier riding on top of a BMP or some other IFV. A second vehicle pulls up next to you with another guy on top and he seems to be getting orders over his head set, he then signals the driver by using his rifle to tap against the armor to go faster. The setting was in a city, while it was snowing. I have not been able to find this video since the internet is like one big landfill, and it's been somewhat bothering me for days so if any one knows what I'm talking about it'd be very helpful.